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这个正则表达式是什么意思?谁能解释一下_这里的意义。
_
String s =("[ ]*[nN][eE][wW][ ]*"+s1+"[ ][\\t]*[ =_a-zA-Z]*");
没有什么特别的意思。所以它的字面意思是'_'字符。
你的正则表达式意味着: